diff --git a/routing/routing_session.cpp b/routing/routing_session.cpp
index 90b7e9d63d..1a73559946 100644
--- a/routing/routing_session.cpp
+++ b/routing/routing_session.cpp
@@ -262,7 +262,7 @@ void RoutingSession::Reset()
 
 void RoutingSession::SetState(SessionState state)
 {
-  if (m_changeSessionStateCallback)
+  if (m_changeSessionStateCallback && m_state != state)
     m_changeSessionStateCallback(m_state, state);
 
   m_state = state;
diff --git a/routing/routing_session.hpp b/routing/routing_session.hpp
index 2d9f9840d0..1cd1c0fd70 100644
--- a/routing/routing_session.hpp
+++ b/routing/routing_session.hpp
@@ -123,6 +123,7 @@ public:
                            RemoveRouteCallback const & removeRouteCallback);
   void SetProgressCallback(ProgressCallback const & progressCallback);
   void SetCheckpointCallback(CheckpointCallback const & checkpointCallback);
+  /// \brief Sets a callback which is called every time when RoutingSession::m_state is changed.
   void SetChangeSessionStateCallback(ChangeSessionStateCallback const & changeSessionStateCallback);
 
   void SetSpeedCamShowCallback(SpeedCameraShowCallback && callback);